package collection;

import java.util.ArrayList;
import java.util.List;

/**
 * List subList(int start,int end)
 * 截取子集
 */
public class ListDemo3 {
    public static void main(String[] args) {
        //泛型只能指定引用类型,若要指定基本类型则要使用对应的包装类
        List<Integer> list = new ArrayList<>();
        for (int i = 0; i < 10; i++) {
            list.add(i);
        }
        System.out.println(list);

        List<Integer> subList = list.subList(3, 8);
        System.out.println(subList);


        //将子集每个元素扩大10倍
        for (int i = 0; i < subList.size(); i++) {
//            int num=subList.get(i);
//            num=num*10;
//            subList.set(i,num);

            subList.set(i, subList.get(i) * 10);
        }

        //[30,40,50,60,70]
        System.out.println(subList);
        /*
        对子集的任何修改就是对原集合对应元素的操作
         */
        System.out.println(list);

        //删除list集合中的2-8这部分元素?
        list.subList(2,9).clear();
        //[0,1.9]
        System.out.println(list);


    }
}
